(JavaScript) Fetch Full Email Given Email Header

When you fetch email headers using UIDs instead of sequence numbers, the email object (which includes only the header) will have auto-generated ckx-imap-* headers. These headers provide details like the UID and attachments. The IMAP UID is found in the ckx-imap-uid header. Additionally, the ckx-imap-isUid header indicates whether the email header was downloaded by UID, showing YES or NO. Since sequence numbers can change if emails are deleted, UIDs are essential for downloading the correct full email.

The Chilkat Email object offers a GetImapUid method to retrieve the UID from the ckx-imap-uid header. This UID can be used to fetch the full email.

Note: This example requires Chilkat v11.0.0 or greater.

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

var success = false;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

var imap = new CkImap();

// Connect to an IMAP server.
// Use TLS
imap.Ssl = true;
imap.Port = 993;
success = imap.Connect("imap.example.com");
if (success == false) {
    console.log(imap.LastErrorText);
    return;
}

// Login
success = imap.Login("***","***");
if (success == false) {
    console.log(imap.LastErrorText);
    return;
}

// Select an IMAP mailbox
success = imap.SelectMailbox("Inbox");
if (success == false) {
    console.log(imap.LastErrorText);
    return;
}

var emailHeader = new CkEmail();
var emailFull = new CkEmail();

var uid = 2014;
var isUid = true;

// Fetch only the email header
success = imap.FetchEmail(true,uid,isUid,emailHeader);
if (success == false) {
    console.log(imap.LastErrorText);
    return;
}

// Now fetch the full email
var uidFromCkxHeader = emailHeader.GetImapUid();
if (uidFromCkxHeader < 0) {
    // Failed. 
    console.log("No ckx-imap-uid header was found.");
    return;
}

success = imap.FetchEmail(false,uid,isUid,emailFull);
if (success == false) {
    console.log(imap.LastErrorText);
    return;
}

// OK, we have the full email, do whatever we want...

// Disconnect from the IMAP server.
success = imap.Disconnect();